Shuttle check for looms



Jan. 18, 1927. 1 1,615,189

H. A. DAVIS SHUTTLE CHECK FOR LQOMS Filed Oct. 24 1925 lliillilili mill" Inventor Harry A. DGVIS l atentei'l Jan. 18, 1927.

UNITED STATES HRRY A. DAVIS, or HOPEDALE, AssacHesET-rs,issmos are pages, dbniojgk.

PATENT TION, F HOPEDALE, MASSACHUSETTS, ACORPOR'AT'ION 0F MAINE.

SHUTTLE CHECK sen reams.

Anpli cat ien filed October 24, 1925. serial No. 64,556.

stick "at the conclusion of its picking moveinen't. The invention relates to that type of mechanism employing a check strap or loop member. s i

The object of the invention is to prov de means for retarding the movement of the check jstiap or loop in accordance with the requirements of the existing conditions.

The objectof the invention is further to friction retarding means for the check strap or loop in which the amount of friction may he adjusted or var ed as req'aireaja which the friction 1s applied by yieldin' 4 pressu e nd in wh ch thelim t of the yie ding pressure thus applled 1s ad ustat e he bbject ofthe invention is further to a frictio'n retarding means for the check strap or loop which shall be simple in ciinstriiction, certain in action, and adjusttheir; asses o These other. bbjectsand features of the iiiventioh will appear more fully from the accompanyin description and drawings iiiid will be pattlcul'arly pointed out in the claiiiis, j n v v V I since the pre'sent invention is concerned eiitir'ely with the "means for checking the movement of the picker stick and of the shuttle since this mechanism is applicableto a wide range of lo'o'in constructions and since the general construction and 0peratioh (if a loom is well-kiiown and familiar to those skilledin the art, it is onlynecessary here to illustrate and describe so much of an ordinary ty e of loom as is necessary to a clisc l'osiire ofith'e present invention.

Fig, 1 isa front elevation of the end portioif oif a lay and shuttle box, together with upper portion of a picker stick, together with i preferred form of the present 1nvention:

Fig. 2 is a top plan viewpartially horiiontal cross section of the check strap and loop" and theh mechanism for retarding the inbvement thereof.

3 is a view chiefly in vertical cross section of a detail taken on the line 3-3 of Fig.2.

F i'g, 4 is a View in vertical cross section taken on the line 4:4 of Fig. 2.

In the construction illustrated, thezlay 1 supports the shuttle box 2 into which the.

shuttle, not shown, enters at the end of its flight and from which it is picked by the picker stick 3. This picker stick swings back and forth longitudinally of the lay in the usual manner. The present invention has to do withthe retarding or checking of the movement of the picker stick at each end of its throw and consequently of the shuttle when the shuttle enters the;box.

The check strap or loop herein shown as a strap of leather 4 is mounted beneath the lay surrounding the path ofthe picker stick. This strap hasits ends 5 clamped by. means of a bolt 6 betweena plate- 7 and abracket 8 whi'chydepends from the la. The ends 9 of the plate are rounded o and serve .as stops for the extreme movement of thestrap. The str'ap thus forms a loop extending hori- Zontally beneathand parallel with the lay and the length of this loop is materiallyless than the movement of the picker stick, so that as the picker stick nears either .end of its throw, it engages an end of the loop of the strap and moves the strap longitudinally.

In this invention the movement ;of .the picker stick is retarded by applying friction to the flexible strap and thus retarding its longitudinal movement-.

In the construction illustrated, a bracket 10 is provided having a bed plate 11 adapted to extend beneath and fit against the bottom of the lay and having a flange 12 extending upwardly from the bed plate 11 and fitting against the front of the lay. Thisrbracket is securely bolted in place by bolts-.13,

The bracket carries, or has formed integral therewith, a depending vertical .bar 14: presenting a rounded face frictionally ,engaging-the inner face of the strap. This bar at its lower end is preferably provided with a forwardly projected foot 15 toprevent downward movement of the strap when loose' or when being adjusted.

A base 16 is mounted on the bracket-10 and is adjustable laterally of the strap, For this'purpose the bracket 10 is'. provided with a forwardly projecting slotted flange 17 provided on its bottom face with a guidew ay 18 fitting a corresponding guide on the base 16. A bolt 19 passing through the slot in the flange 17 and throu h a slot in the base 16 enables the base to no adjusted laterally and locked in adjusted position.

The base 16' is provided with a rigid bar 20 depending therefrom and presenting a rounded rear face frictionally engaging the outer face of the strap at one side, at the left, as shown in the drawing, of the bar 1 1.

The base 16 has also journalled thereon a third bar 21 presenting a rounded face frictionally engaging the outer face of the strap l at the other side or atthe right of the bar 14; and this bar 21 is yieldingly pressed against the strap.

In the construction illustrated, a vertical stud 22 has its upper end 23 riveted or otherwise firmly secured in the base 16. Beneath the base this stud is provided with a polyg onal flange 21 and at its lower end the stud is threaded to receive a nut 25. A sleeve 26, flanged at its upper end 27, is provided also at its upper end with a polygonal recess fitting the flange 2st of the stud. It will thus be seen that if the sleeve 26 is lowered on the stud 22, it may be released from the polygonal flange 21, rotated to any extent desired, and then looked in place by raising it again into engagement with the polygonal flange 2 1. A horizontally extending tension arm 28, carrying at its free end the bar 21, is provided with a hub 29 journalled on the sleeve 26. The nut with an interposed washer 30 holds the sleeve 26 in position and forms the lower support for the tension arm. A helical spring 31 is coiled about the hub 29 and is connected at its upper end 82 to the flange 27- of the sleeve 26 and at its lower end 33 to the tension arm 28. This spring thus acts to swing the tension arm inwardly and cause it yieldingly to press against the strap. The extent of this pressure is adjusted by rotarily adjusting the sleeve 26 by the means already described. The extent or the limit of movement of the yieldingly pressed bar 21 toward the strap is adjustable. For that purpose a set screw 34 is threaded through a flange 35 projecting upwardly from the tension arm 28 and abuts against the bar 20. This construction also constitutes a further means'for adjusting the yielding pressure of the bar 21 against the strap because any adjustment of the setscrew 3 alters to some extent the angular relation of the arm 28 and the fixed end 32 of the spring 31.

The head of the screw 84 is so positioned as to receive readily a key or wrench by which the screw may be turned to effect these adjustments while the loom is in operation and without stopping or interfering Withits operation.

It will thus be seen that a very wide range of adjustmentof frictional control of the longitudinal movement of the strap 10 is provided. The strap passes in a sinuous course between the three bars, the bar 14: being located at one face and the bars 20 and 21 at the opposite face. The bars 20 and 21, carried by the face 16, are bodily adjustable transversely of the strap relatively to the bar 14, thereby varying the sinuosity of the course of the strap and the retarding action effected by the bars. Furthermore, the pressure of the bar 21 against the faceof the strap is a yielding pressure which thus varies according to the conditions and this yielding pressure. is itself adjustable primarily by the rotary adjustment of the sleeve 26 and secondarily by the adjustment of the set screw 84. Furthermore, the limit of the pressing movement of the bar 21 is adjustable by means of the 'set screw 34. It is thus possible very accurately to regulate the retardation of the longitudinal movement of the strap in checking the movement of the picker stick and shuttle so as to meet any required condition.

Having thus described the invention, what is claimed as new, and desired to be secured by Letters Patent, is:

1. A shuttle check for a loom comprising a flexible strap movable longitudinally by the picker stick, three parallel bars separated longitudinally of the strap, one at one face of the strap and two at the other face frictionally engaging the strap and between which and by which alone the strap is caused to pass in a sinuous course, and means for yieldingly pressing one of said bars against the strap, thereby to vary the retardation of 116 movement of the strap caused by the ars.

2. A shuttle check for a loom comprising the construction defined in claim 1, together with means for adjusting the amount of pressure exerted by said yieldingly pressed 3. A shuttle check for a loom having the construction defined in claim 1, together with means for adjustably limiting the movement of said yieldingly pressed bar toward the strap.

4. A shuttle check for looms comprising a longitudinally movable strap, a stud, a sleeve on the stud, means for rotarily adjusting the sleeve and for locking itin adjusted position, a tension arm journalled on the sleeve and engaging the strap to retard the movement thereof, and a helical spring concentric with the sleeve and secured at one end to the sleeve and at the other end to the arm.

5. A shuttle check for looms comprising a longitudinally movable strap, a stud, a polygonal flange on the stud, a sleeve having a polygonal recess fitting said flange and movable longitudinally and rotarily on the stud, whereby it may be rotarily adjusted on the stud and locked in any adjusted position, a tension arm journalled on the sleeve and engaging the strap to retard the movement thereof, and a helical spring concentric with the sleeve and secured at one end to the sleeve and at the other end to the arm.

6. A shuttle check for a loom comprising a flexible strap movable longitudinally by the picker stick, a bracket and means for rigidly mounting it adjacent the strap, a base and means for adjustably securing it to the bracket laterally of the strap, a bar on the bracket frictionally engaging one face of the strap, a bar on the base frictionally engaging the other face of the strap at one side of the first bar, an arm journalled on the base on an axis parallel with said bars and carrying at its free end a third arallel bar frictionally engaging the same ace of the strap as the second bar but at the opposite side of the first bar, and

means for yieldingly swinging the arm on its axis to press the third bar against the strap.

7. A shuttle check for a loom comprising a flexible strap movable longitudinally by the picker stick, three parallel bars, one at one face of the strap and two at the other face, frictionally engaging the strap and between which the strap passes in a sinuous course, means for yieldingly pressing one of said bars against the strap, thereby to vary the retardation of the movement of the strap caused by the bars, and means operable while the'loom is in motion for adjustably limiting the movement of said yieldingly pressed bar toward the strap and for adjusting the yielding pressure of said bar.

In testimony whereof, I have signed my name to this specification.

, HARRY A. DAVIS. 

